Open the Network troubleshooter by swiping in from the right edge of the screen, tapping Search (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Search), entering network troubleshooter in the search box, tapping or clicking Settings, and then tapping or clicking Identify and repair network problems.

Method 2:

Make sure that wireless connections are turned on:

1. On the Start screen, type Control Panel, click the Apps filter, and then tap or click Control Panel.

2. In the left pane, tap or click Wireless.

3. In the right pane, verify that Airplane mode is off and that Wireless devices are on.

Then, check the current connections:

1. Open the Settings charm by swiping in from the right or pointing the mouse to the lower-right corner of the screen.

2. Tap or click the networking icon, indicated by either a monitor with a network cable (for a wired connection) or a set of five stepped bars (for a wireless connection).

3. Under the list of wireless networks, choose your network, and enter any credentials needed to connect to the network.

Method 3:

Essentially, Win8 couldn't deal with the fact that the WiFi connection was handled thru the program the stick manufacturer has supplied, instead of letting Windows handling it.

Solution in steps: uninstall the management software (via Control Panel) / verify that the driver is still installed (via Control Panel) / 'remove' the WiFi stick from the Win8 Hardware Panel (Tile?) / shut down the PC / remove (unplug) the WiFl stick / boot the PC / re-plug the stick and let Windows discover it / log-in to your network using the Windows supplied function for this / Done.

Make sure you have the latest wireless driver from the PC manufacturer's web site. If you already have it reinstall it anyhow in case the installed instance is corrupted.

Hope the above information is helpful. If you have any question get back to us, we are happy to help you.